#include <stdio.h>
#include <unistd.h>

int main()
{
    char    *arglist[3];

        arglist[0] = "ls";
	    arglist[1] = "-l";
	        arglist[2] = 0 ;//NULL
		    printf("* * * About to exec ls -l\n");
		        execvp( "ls" , arglist );//第一个参数传递的是文件名
			    printf("* * * ls is done. bye");

			        return 0;
				}
